Network protocol is a set of rules and conventions that govern the communication between devices on a network. It defines the format, timing, sequencing and error control of data exchange. Some examples are:
- HTTP (Hypertext Transfer Protocol) : This is the protocol used for transferring web pages and other resources on the World Wide Web. It defines how a web browser requests a web page from a web server and how the web server responds to the request.
- FTP (File Transfer Protocol) : This is the protocol used for transferring files between computers on a network. It defines how a client computer establishes a connection with a server computer and how they exchange files and commands.
- PPP (Point-to-Point Protocol) : This is the protocol used for establishing a direct connection between two devices over a serial link, such as a phone line or a cable. It defines how the devices negotiate the parameters of the connection, such as authentication, compression and encryption.
- SMTP (Simple Mail Transfer Protocol) : This is the protocol used for sending and receiving email messages on a network. It defines how an email client sends an email message to an email server and how the email server forwards the message to another email server or delivers it to the recipient.
- TCP/IP (Transmission Control Protocol/Internet Protocol) : This is the protocol suite that forms the basis of the Internet. It consists of two main protocols: TCP and IP. TCP is responsible for ensuring reliable and ordered delivery of data packets between devices on a network. IP is responsible for routing data packets across different networks based on their addresses.
- POP3 (Post Office Protocol version 3) : This is the protocol used for retrieving email messages from an email server. It defines how an email client connects to an email server and downloads the messages to the local device.
- HTTPS (Hypertext Transfer Protocol Secure) : This is the protocol used for transferring web pages and other resources on the World Wide Web securely. It is similar to HTTP, but it uses encryption to protect the data from eavesdropping, tampering and impersonation.
- TELNET (Telecommunication Network) : This is the protocol used for accessing remote computers on a network. It defines how a user can log in to another computer and execute commands as if they were using that computer directly.
- VoIP (Voice over Internet Protocol) : This is the protocol used for transmitting voice and video calls over the Internet. It converts analog voice signals into digital data packets and sends them over IP networks.